本文实例讲述了Yii全局函数用法。分享给大家供大家参考,具体如下:
由于YII致力于完美的整合第三方库,它并没有定义任何全局函数。yii中的每一个应用都需要全类别和对象范围。
例如,Yii::app()->user;Yii::app()->params['name'];等等。我们可以自行设定全局函数,使得代码看起来更加简洁易用。
我们可以保存在globals.php在protected/config目录下。然后,在入口脚本index.php中,定义如下内容:
$globals=dirname(__FILE__).'/protected/config/globals.php';...require_once($yii);require_once($globals);
现在我们可以在应用的任何地方使用我们的全局函数,例如可以使用user()代替Yii::app()->user。注:如果你打算发布一个可重用的组件,请不要组件中使用全局函数,在不同的应用配置中,可能导致无法使用。同时,也应注意与第三方库的冲突,可考虑对每个函数前加上自己的前缀,已做区分,例如框架核心均已C为前缀。
下面是代码包含最常用的一些快捷功能。如还需其他,请自行添加。
/*** This is the shortcut to DIRECTORY_SEPARATOR*/defined('DS') or define('DS', DIRECTORY_SEPARATOR);/*** This is the shortcut to Yii::app()*/function app() { return Yii: :app();}/*** This is the shortcut to Yii::app()->clientScript*/function cs() { // You could also call the client script instance via Yii::app()->clientScript // But this is faster return Yii: :app() - >getClientScript();}/*** This is the shortcut to Yii::app()->user.*/function user() { return Yii: :app() - >getUser();}/*** This is the shortcut to Yii::app()->createUrl()*/function url($route, $params = array(), $ampersand = '&') { return Yii: :app() - >createUrl($route, $params, $ampersand);}/*** This is the shortcut to CHtml::encode*/function h($text) { return htmlspecialchars($text, ENT_QUOTES, Yii: :app() - >charset);}/*** This is the shortcut to CHtml::link()*/function l($text, $url = '#', $htmlOptions = array()) { return CHtml: :link($text, $url, $htmlOptions);}/*** This is the shortcut to Yii::t() with default category = 'stay'*/function t($message, $category = 'stay', $params = array(), $source = null, $language = null) { return Yii: :t($category, $message, $params, $source, $language);}/*** This is the shortcut to Yii::app()->request->baseUrl* If the parameter is given, it will be returned and prefixed with the app baseUrl.*/function bu($url = null) { static $baseUrl; if ($baseUrl === null) $baseUrl = Yii: :app() - >getRequest() - >getBaseUrl(); return $url === null ? $baseUrl: $baseUrl.'/'.ltrim($url, '/');}/*** Returns the named application parameter.* This is the shortcut to Yii::app()->params[$name].*/function param($name) { return Yii: :app() - >params[$name];}/*** A useful one that I use in development is the following* which dumps the target with syntax highlighting on by default*/function dump($target) { return CVarDumper: :dump($target, 10, true);}
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